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physical phenomena > energy source > gravitational contraction > iron core of supernova gravitational contraction
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iron core of supernova gravitational contraction comparison table
Subject is a kind of
gravitational contractionenergy source
iron core of supernova gravitational contractiongravitational contraction

Next gravitational contractionstar gravitational contraction    Upgravitational contraction    Previous gravitational contractiondark cloud gravitational contraction